A 600 MHz 2D-DCT processor for MPEG applications

Abstract

AbstracI n this paper wc present the design of U Two Dimensio n a 1 11 isr w t P Cosin e Tran q o rm (2 D-D CT) y ro c e ssor und cis iniplPnieniution itsinx 0.6 [L7lL (;allium ArscJnidP Techtiol oxy. The archi ti) cturr (IJ' the processor, thut resembles uti FCT-MMM (Fust Cosine Transjbrm-Matrix Matrix Multiplicarion) urchitrcture. was dewloped using Distrihidted Ariihtnriic. (0.4) in order to redui%c the a r w riquired. Thi. proc-tjssor has uboui 50k trunsisiors und occupies an ureu of 31.8 i r ! m 3 . I t is a h k io process 400 Myixels ptjr secvnd und ut a c.lor.liJi.rir/ueticy of600 M H z , which is fat beyond thcJ rtJyuirc~nwiiis for real rim(. high d&iitiotr moving pictims in the MPE(;2 standard. Speciul cwnsideration is given to thc implrmi~niotion of' U transposition RAM which rmstitutc~s thi' horili~tieik of t h e algorithm. A 64 word x 12 bit, 1 ns access ritne Truiispositioii RAM was dewloped using U n w 1)ynarnii~ RAM c~) l l .

A survey of media processing approaches

“…This class of processors can be classified into single chip (monolithic) and distributed (chip-set) implementations. Examples of the monolithic or function specific processors are dedicated [discrete cosine transform (DCT)] chips [8]- [10]. LSI Logic's L64735 DCT processor chip and Mitsubishi's Advanced Television (ATV) 5 decoder are good examples of the distributed implementation.…”

“…M-PIRE [8] is a programmable MPEG-4 multimedia codec VLSI for mobile and stationary applications. It integrates a RISC core, two separate DSPs, a 64-bit dual-issue VLIW macroblock engine, and an autonomous I/O processor on a single chip to cope with the high flexibility and processing demands of the MPEG-4 standard.…”

“…An ASIC for motion estimation and compensation which can be used in conjunction with a fixed point DSP chip for MPEG-4 decoding has been presented in [50]. A 2-D DCT processor is detailed in [8]. The processor has about 50 K transistors and is capable of processing upto 400 Mpixels per second and at a clock frequency of 600 MHz.…”